Affinity tag for recombination protein recruitment
a technology of recombination protein and affinity tag, which is applied in the direction of peptides, viruses/bacteriophages, biochemistry apparatus and processes, etc., to achieve the effects of rapid association kinetics, enhanced recruitment, and increased nucleic acid-guided editing efficiency
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[0147]The following examples are put forth so as to provide those of ordinary skill in the art with a complete disclosure and description of how to make and use the present invention, and are not intended to limit the scope of what the inventors regard as their invention, nor are they intended to represent or imply that the experiments below are all of or the only experiments performed. It will be appreciated by persons skilled in the art that numerous variations and / or modifications may be made to the invention as shown in the specific aspects without departing from the spirit or scope of the invention as broadly described. The present aspects are, therefore, to be considered in all respects as illustrative and not restrictive.
example i
the Cell Growth Module
[0148]One embodiment of the cell growth device as described herein was tested against a conventional cell shaker shaking a 5 ml tube and an orbital shaker shaking a 125 ml baffled flask to evaluate cell growth in bacterial and yeast cells. Additionally, growth of a bacterial cell culture and a yeast cell culture was monitored in real time using an embodiment of the cell growth module shown in the integrated instrument described herein in relation to FIGS. 2A-2C.
[0149]In a first example, 20 ml EC23 cells (E. coli cells) in LB were grown in a 35 ml rotating growth vial with a 2-paddle configuration at 30° C. using the cell growth device as described herein. The rotating growth vial was spun at 600 rpm and oscillated (i.e., the rotation direction was changed) every 1 second. In parallel, 5 ml EC23 cells in LB were grown in a 5 ml tube at 30° C. and were shaken at 750 rpm. OD600 was measured at intervals using a NanoDrop™ spectrophotometer (Thermo Fisher Scientific...
example ii
ntration
[0153]The TFF module as described above in relation to the automated cell processing instrument in FIGS. 2A-2C has been used successfully to process and perform buffer exchange on both E. coli and yeast cultures. See U.S. Ser. No. 16 / 798,302, filed 22 Feb. 2020. In concentrating an E. coli culture, the following steps were performed:
[0154]First, a 20 ml culture of E. coli in LB grown to OD 0.5-0.62 was passed through the TFF device in one direction, then passed through the TFF device in the opposite direction. At this point the cells were concentrated to a volume of approximately 5 ml. Next, 50 ml of 10% glycerol was added to the concentrated cells, and the cells were passed through the TFF device in one direction, in the opposite direction, and back in the first direction for a total of three passes. Again the cells were concentrated to a volume of approximately 5 ml. Again, 50 ml of 10% glycerol was added to the 5 ml of cells and the cells were passed through the TFF devic...
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